A pin fin of uniform, cross-sectional area is fabricated of aluminum alloy (k=10w/mk)

cross-sectional
fabricated-aluminum

#1

A pin fin of uniform, cross-sectional area is fabricated of aluminum alloy (k=10w/mk). The fin diameter is d=4mm and the fin is exposed to convective conditions characterized by h=220w/m^2k). It is reported that the fin efficiency is 0.65. Determine the fin length L and the fin effectiveness Ef. Account for tip convection

Answer:

1.31